The ERGObaby Sport Carrier is made of a blend of 35% cotton and 65% polyester, the lighter, more-breathable fabric helps to keep babywearers more comfortable. The carrier's body features a vent for extra breathability, keeping both baby and parent cooler. The waist belt can extend an additional 5" further than our Standard or Organic carriers, and the shoulder straps can extend an extra 4" which provides a comfortable fit for babywearers of all sizes. Type: Soft Carriers Color Mapping: Blue